In the plum, the blue color dominates over the yellow. Identify hybrids of the first and second

In the plum, the blue color dominates over the yellow. Identify hybrids of the first and second generation when crossing blue homozygous with yellow homozygous.

Let’s designate the gene that causes the development of blue fruits in the plum as C, then the gene that causes the yellow color of the plum fruits will be c.

The parent plants are, according to the condition, homozygous.

Plum with blue fruits will be recorded as CC, the germ cells produced by it – as C.

A plum that yields yellow fruits – сс, its germ cells – с.

In F1 we ​​get homogeneous offspring: 100% of the plants will have the Cc genotype and blue fruits. They will produce two types of germ cells: c and C.

In F2, from crossing plum hybrids with each other, we get the following offspring options:

25% – CC: plums with blue fruits;

50% – Сс: plums with blue fruits;

25% – сс: plums with yellow fruits.